Loevenhart and Crandall1 have recently suggested the use of calcium carbonate in the treatment of the gastric hyperacidity syndrome. The reason for suggesting it was that calcium carbonate is a very insoluble substance and that the suspension is apparently neutral in reaction, although it has a high neutralizing power for acids. In this connection we decided to determine the hydrogen ion concentration of suspensions of calcium carbonate in water in the absence as well as in the presence of carbonic acid. Our search of the literature failed to reveal any study of this question.
PREPARATION OF SOLUTIONS
The calcium carbonate used was prepared by precipitation from calcium hydrate solution with carbon dioxide. The saturated calcium carbonate solution was prepared by washing the precipitated salt with an abundance of conductance water, after which it was dissolved in conductance water free of carbon dioxide. After the solution had been allowed to
WILLIAMS JW, CHUCKA JA. CALCIUM CARBONATE AND CALCIUM BICARBONATE: HYDROGEN ION CONCENTRATION OF SATURATED SOLUTIONS IN WATER. JAMA. 1927;89(6):445–446. doi:10.1001/jama.1927.02690060025008
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